Christians, why do you think that some of the Jews were not Black?

Israel borders Africa, Jacob's Family spent more than 400 years living in Africa, the Bible chronicles a lot of Intermarriage between the descendants of Ham and the descendants of Shem. If there Blacks living in the United States, Canada, Germany and England, do you actually think that there would not be any Blacks among the Jews? Now that is what I call racist thinking. I have been to that part of the world, and many of the people in that part of the world were mixed with African Blood. I am an African American, and I have found many Arabs who were darker than me.